Thyroglobulin Blood Test (Tg – Thyroid Cancer Marker)
Monitor thyroid cancer treatment response with precision.
What’s tested
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The Thyroglobulin Blood Test measures the level of thyroglobulin (Tg) in the blood. Thyroglobulin is a protein produced by thyroid follicular cells, and it serves as a tumour marker for thyroid cancer. This test is primarily used to monitor treatment response and detect recurrence in patients with differentiated thyroid cancer (papillary and follicular). It is also used to assess the effectiveness of thyroidectomy and radioactive iodine therapy. The test is not intended for initial diagnosis of thyroid cancer but is a valuable tool in post-treatment surveillance.
Biomarkers
- Thyroglobulin (Tg): A protein produced by the thyroid gland. Elevated levels may indicate residual thyroid tissue, benign conditions, or persistent/recurrent thyroid cancer. In patients who have undergone total thyroidectomy, Tg levels should be very low or undetectable; any rise may suggest cancer recurrence.
Why it matters
Regular monitoring of thyroglobulin levels helps your doctor track the effectiveness of thyroid cancer treatment and detect any signs of recurrence early. This simple blood test provides critical information for ongoing management and peace of mind.
No special fasting required. Drink plenty of water prior to your appointment for a smooth blood draw.
- Identification: Photo ID (Passport or Driving Licence) is only required if you need your report for official, employment, visa/travel, premarital, or Identity-Verified Certificate (IVS) purposes (not required for personal health & wellness testing).
This test provides an official, quality-assured laboratory report with reference ranges. These results are for clinical information and do not replace your GP or consultant. Always discuss abnormal results with your GP or specialist in the context of your medical history.
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